20660935 has 8 divisors (see below), whose sum is σ = 24860160. Its totient is φ = 16484064.

The previous prime is 20660897. The next prime is 20660947. The reversal of 20660935 is 53906602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20660935 - 2¹¹ = 20658887 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20660897 and 20660906.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3480 + ... + 7309.

It is an arithmetic number, because the mean of its divisors is an integer number (3107520).

Almost surely, 2^20660935 is an apocalyptic number.

20660935 is a deficient number, since it is larger than the sum of its proper divisors (4199225).

20660935 is a wasteful number, since it uses less digits than its factorization.

20660935 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11177.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 20660935 is about 4545.4301226617. The cubic root of 20660935 is about 274.3995051302.

The spelling of 20660935 in words is "twenty million, six hundred sixty thousand, nine hundred thirty-five".